324,000 research outputs found
Approximations for e+ e- –-> W+ W-
No full textDenner A, Dittmaier S, Fleischer J, Kneur JL, Kolodziej K. Approximations for e+ e- –-> W+ W-. 1991
Sibylle Beetz-Rahm / Liselotte Denner / Thomas Riecke-Baulecke (Hrsg.): Jahrbuch für Lehrerforschung und Bildungsarbeit. Band 3. Weinheim und München: Juventa 2002 (342 S.) [Rezension]
Get PDFRezension von: Sibylle Beetz-Rahm / Liselotte Denner / Thomas Riecke-Baulecke (Hrsg.): Jahrbuch für Lehrerforschung und Bildungsarbeit. Band 3. Weinheim und München: Juventa 2002 (342 S.; ISBN 3-7799-1333-X; 27,00 EUR)
Liselotte Denner / Eva Schumacher (Hrsg.): Übergänge im Elementar- und Primarbereich reflektieren und gestalten. Beiträge zu einer grundlegenden Bildung. Bad Heilbrunn: Klinkhardt 2004 (317 S.) [Rezension]
Get PDFRezension von: Liselotte Denner / Eva Schumacher (Hrsg.): Übergänge im Elementar- und Primarbereich reflektieren und gestalten. Beiträge zu einer grundlegenden Bildung. Bad Heilbrunn: Klinkhardt 2004 (317 S.; ISBN 3-7815-1304-1; 19,50 EUR)
Liselotte Denner: Bildungsteilhabe von Zuwandererkindern. Eine empirische Studie zum Übergang zwischen Primar- und Sekundarstufe (Reihe: Karlsruher pädagigsche Studien, Bd. 8). Karlsruhe: Book on Demand 2007 (264 S.) [Rezension]
Get PDFRezension von: Liselotte Denner: Bildungsteilhabe von Zuwandererkindern. Eine empirische Studie zum Übergang zwischen Primar- und Sekundarstufe (Reihe: Karlsruher pädagigsche Studien, Bd. 8). Karlsruhe: Book on Demand 2007 (264 S.; ISBN 978-3-8334-6783-7; 28,00 EUR)
Low-virtuality photon transitions gamma* -> f(f)over-bar and the photon-to-jet conversion fundtion [Low-virtuality photon transitions γ⁎→ff ̄ and the photon-to-jet conversion function]
No full textThe calculation of electroweak corrections to processes with jets in the final state involves contributions of low-virtuality photons leading to jets in the final state via the singular splitting γ⁎→qq ̄. These singularities can be absorbed into a photon-to-jet “fragmentation function”, better called “conversion function”, since the physical final state is any hadronic activity rather than an identified hadron. Using unitarity and a dispersion relation, we relate this γ⁎→qq ̄ conversion contribution to an integral over the imaginary part of the hadronic vacuum polarization and thus to the experimentally known quantity Δαhad(5)(MZ2). Therefore no unknown non-perturbative contribution remains that has to be taken from experiment. We also describe practical procedures following subtraction and phase-space-slicing approaches for isolating and cancelling the γ⁎→qq ̄ singularities against the photon-to-jet conversion function. The production of Z+jet at the LHC is considered as an example, where the photon-to-jet conversion is part of a correction of the order α2/αs relative to the leading-order cross section
Measurement of triple gauge boson couplings from W⁺W⁻ production at LEP energies up to 189 GeV
No full textA measurement of triple gauge boson couplings is presented, based on W-pair data recorded by the OPAL detector at LEP during 1998 at a centre-of-mass energy of 189 GeV with an integrated luminosity of 183 pb⁻¹. After combining with our previous measurements at centre-of-mass energies of 161–183 GeV we obtain κ = 0.97_{-0.16}^{+0.20}, g_{1}^{z} = 0.991_{-0.057}^{+0.060} and λ = -0.110_{-0.055}^{+0.058}, where the errors include both statistical and systematic uncertainties and each coupling is determined by setting the other two couplings to their Standard Model values. These results are consistent with the Standard Model expectations
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Measurement of the production cross section of jets in association with a Z boson in pp collisions at √s=7 TeV with the ATLAS detector
Get PDFMeasurements of the production of jets of particles in association with a Z boson in pp collisions at s√=7 TeV are presented, using data corresponding to an integrated luminosity of 4.6 fb−1 collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in Z events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum p T > 30 GeV and rapidity |y| < 4.4. The results are compared to next-to-leading-order perturbative QCD calculations, and to predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements supplemented by parton showers
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